Fill cap for gasoline tanks



May 31, 1932- G. w. lsBELL 1,861,395

FIDL CAP FOR GASOLINE TANKS Filed May 29, 1929 a j Z ag wmew PatentedMay 31, 1932 UNITEn srarss GEORGE W. ISBELL, F BALTIMORE, MARYLAND FILLCAP FOR GASOLINE TANKS Application filed May 29,

This invention relates to fill caps for gasoline tanks and moreparticularly to that type of structure wherein the gasoline tank is p0-sitioned beneath the surface of the earth and is provided with a fillpipe extending upwardly from said tank, the upper end of said pipe beingfitted with a cap the top of which is flush with the ground or thesurface of a pavement.

The primary object of this invention, is therefore, the provision of afill cap, which is simple in construction, easy to manufacture, andeflicient in operation. ther objects of this invention will becomeapparent as the description thereof proceeds, reference being had to theaccompanying drawings wherein Figure 1 is an elevational sectional viewof the fill cap as applied to a fill pipe and gasoline tank.

Figure 2 is a partial sectional view taken on line 2-2, Figure 1,looking in the direction of the arrows.

A gasoline tank 1 is placed in the ground and has attached thereto afill pipe 2, the upper end of which terminates short of the sur face ofthe earth or the pavement 3. Attached to the upper end of the fill pipe2 is a fill cap 4, said fill cap comprising an upper cylindrical portionan intermediate cylindrical portion 6 and a lower cylindrical portion 7.The lower cylindrical portion 7 is interiorly screw threaded as at 8 sothat the fill cap 41 may be threaded on the upper end of the fill pipe2, which is adapted to abut the open partition or stop 9 when the fillcap 41 is screwed all the way down. The stop 9 separates theintermediate cylindrical portion 6 and the lower interiorly threadedcylindrical portion 7. said intermediate portion 6 being adapted toreceive a lock (not shown) and is provided with a recessed portion 10the purpose of which is to receive the latch or bolt of the lock whenthe same is locked in place.

The upper cylindrical portion 5 is larger in d ainr-ter than either theintermediat or lock portion 6, or the lower or screw threaded portion 7,the upper end thereof being open as at 11 and the lower end thereofbeing formed with a circular shelf 12, said cylindrical por- 1929.Serial No. 366,929.

tion 5 being adapted to receive a closure plug 13. Positioned within theplug receiving portion 5 of the fill cap l and in press-fittedengagement therewith is a brass sleeve or bushing 14, the fill cap 4being preferably made of steel or other suitable material.

The closure plug 13 comprises two connect ed upper and lower members 15arid 16. The lower member 16 is cylindrical in shape and formed with anupper extension 17 of a reduced diameter said extension 17 beingprovided with a screw threaded opening 18. The upper member 15 is alsocylindrical in shape and is provided with a depending portion 19 ofreduced diameter said portion 19 being provided with a threadedextension 20 adapted to fit within the threaded opening 18 in the member16, so that the extension 17 will abut the depending portion 19, formingbetween the members 15 and 16 a peripheral recessed portion 21. i

Positioned within said peripheral recess 21 and seated on the lowermember 16 is a cup shaped washer 22 of leather or rubber, or any oth rsuitable material, the vertical wall of said washer 22 beingsubstantially flush with the cylindrical surface of the members 15 and16. A helical spring 23 of circular shape is positioned between the wallof the washer 22 and the depending portion 19 of the member 15 and isadapted to press said wall into tight engagement with the sleeve 14: andto maintain the plug 13 in fluid tight engagement with the wall of thefill cap 41. It is apparent that the coil spring 23 and washer 22 arepositioned on the respective members 15 and 16 before the same areattached to eacn other.

To facilitate ready removal of the plug 13, the upper member 15 isprovided with a circular recess 2-1 in its top, and a pin 25 is insertedtransversely through said member and adapted to pass through said recess24:, said pin being rigidly secured to said member 15, The pin 25 in therecess 24; provides a means for pulling the plug 13 out of the fill capWhen it is desired to put gasoline in the tank, the plug 13 is firstremoved, then the look (if in place), and the nozzle of the gasolinehose is inserted into the plug receiving portion 5,

the gasoline then flowing through the fill cap into the fill pipe 2 andinto the tank 1.

WVhile a preferred embodiment of the fill cap has been shown anddescribed, it is obvious that the same is susceptible of variousmodifications within the scope of the appended claims.

I claim 1. A vapor tight closure for hollow cylindrical members, saidclosure comprising an upper cylindrical member and a lower circularmember, a depending extension on said upper member of reduced diameter,a threaded opening in said lower member, a threaded extended portion onsaid extension of said upper member adapted to be threaded into saidthreaded opening, a cupped washer positioned in the peripheral recessdefined by said upper and lower members, and a circular helical springdisposed between said cup washer and said extension on the upper mem beradapted to hold said washer in engagement with the hollow cylindricalmember.

2. A vapor tight closure plug for hollow cylindrical members, saidclosure plug comprising an upper cylindrical member and a lower circularmember, a depending extension on said upper member of reduced diameter,a threaded opening in said lower member, a threaded extended portion onsaid extension of said upper member adapted to be threaded into saidtheraded opening, a cupped washer positioned in the peripheral recessdefined by said upper and lower members, and a circular helical springdisposed between said cupped Washer and said extension on the uppermember adapted to force said washer into tight engagement with thehollow cylindrical member.

3. A vapor tight closure plug for fill boxes, comprising an uppercylindrical member and a lower cylindrical member, extensions on each ofsaid members of reduced diameter, a threaded opening in the extension ofsaid lower member, a threaded extending portion on said extension ofsaid upper member adapted to be threaded into said threaded opening, acupped washer positioned in the peripheral recess defined by said upperand lower members, and a circular helical spring disposed between saidcupped washer and said extension on the upper member adapted to forcesaid washer into tight engagement with the fill box.

In testimony whereof I atfix my signature.

GEORGE W. ISBELL.

